Prefabricated drain structure

ABSTRACT

Disclosed is a drainage canal structure, and in particular is a prefabrication type drainage canal structure which makes it possible to prevent a transformation and disengagement of a drainage canal in such a way that a plurality of drainage canal bodies each equipped with a waveform reinforcing unit are assembled in series, and a protection net is arranged over the drainage canal bodies which are buried underground, and a side reinforcing unit is installed into the ground so that a bottom foundation can be expanded, and the drainage canal bodies can be fixed in place on the ground. Trees, gravels, etc. can be prevented from penetrating into the drainage canal bodies thanks to the protection net. The drainage canal structure with an increased self-weight can be provided, which can keep it in place. Work and construction time can be saved because the drainage canal structure can be manufactured on the spot.

BACKGROUND

The present invention relates to a drainage canal structure, and in particular to a prefabrication type drainage canal structure which makes it possible to prevent a transformation and disengagement of a drainage canal in such a way that a plurality of drainage canal bodies each equipped with a waveform reinforcing unit are assembled in series, and a protection net is arranged over the drainage canal bodies which are buried underground, and a side reinforcing unit is installed into the ground so that a bottom foundation can be expanded, and the drainage canal bodies can be fixed in place on the ground. Trees, gravels, etc. can be prevented from penetrating into the drainage canal bodies thanks to the protection net. The drainage canal structure with an increased self-weight can be provided, which can keep it in place. Work and construction time can be saved because the drainage canal structure can be manufactured on the spot.

Drainage canals are installed in roads, mountains, rivers, etc. or in an agricultural drainage canal, an industrial complex, a housing complex, etc. in order to guide the flows of rain water and drainage water.

More specifically, the above mentioned drainage canals are installed at a bottom of a mountain ridge, a water guide canal, a rain water guide canal, etc. in an attempt to guide rain water or draining water.

The above mentioned drainage canals can be manufactured in a shape of blocks each with a certain length in such a way to cast concrete on the spot (hereinafter referred to a casting work on the spot) or to use a prefabricated concrete block or a synthetic resin.

In most of drainage canals, water is guided to flow inwards over the side walls of the drainage canals; however the water, sometimes, does not flow into the drainage canals due in part to the difference in the physical properties between the concrete and the synthetic resin.

If water flows long through the drainage canals, the synthetic resin may decompose and may be broken because the drainage canals made from the synthetic resin is directly exposed to sunshine.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a prefabrication type drainage canal structure which is invented so as to resolve the problems occurred when the conventional drainage canals heave due to rain water or the original ground moves away, and which makes it possible to prevent the loss of the original ground on which the drainage canals are constructed and to prevent the loss of the installed drainage canal structure. The drainage canal structure can be manufactured on the spot, and a simplified manufacture procedure and a stable assembling structure can be obtained in the present invention.

To achieve the above objects, there is provided a prefabrication type drainage canal structure equipped with a drainage canal body with a channel shaped vertical cross section and installed at a drainage carnal formed on the ground of a cutting area, which comprises a plurality of protrusion type waveform reinforcing units which are formed at regular intervals on at least one of an outer surface, an inner surface and both the inner and outer surfaces of the drainage canal body, a plurality of reinforcing units which are installed in a row at regular intervals traversing the interior of the drainage canal body, and a plurality of through holes which are formed at regular intervals at the tops of both sides of the drainage canal body.

The present invention is directed to a drainage canal structure whose transportation and installation work can be easy, and it can be easily assembled on the spot, and a transformation due to the pressure of surrounding soil can be prevented by forming a waveform reinforcing unit on an outer surface of a drainage canal body. When a drainage canal structure is installed at the drainage canal which is disposed underground, it is possible to prevent gravels from entering the drainage canal body by providing a protection net, thus preventing the clogging of the drainage canal body. The whole weight of the drainage canal structure can be increased by filling with soil the empty space from the outer tops of the drainage canals to the bottoms of the drainage canals including an assistant water way for thereby preventing the transformation and heaving of the drainage canals.

In addition, an eco-corridor for the sake of wild animals can be secured because a protection net is provided over the tops of the drainage canals, so the wild animals are not allowed to enter the drainage canal body, which leads to protection of wild animals.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;

FIG. 1 is a perspective view illustrating a prefabrication type drainage canal structure according to the present invention;

FIG. 2 is a view illustrating a state that a prefabrication type drainage canal structure is installed at a drainage canal according to the present invention;

FIG. 3 is a view illustrating a state that a protection net is removed from a prefabrication type drainage canal structure according to the present invention;

FIG. 4 is a front view illustrating a prefabrication type drainage canal structure of FIG. 3;

FIG. 5 is a view illustrating a state that a drainage canal body and a cover unit are separated in a prefabrication type drainage canal structure according to the present invention;

FIG. 6 is a view illustrating a state that an angle unit is assembled to a drainage canal unit of a prefabrication type drainage canal structure according to the present invention;

FIG. 7 is a cross sectional view illustrating a state that a screw bolt is engaged to an angle unit of a prefabrication type drainage canal structure according to the present invention;

FIG. 8 is a view illustrating a state that a wire anchor is engaged to an angle unit of a prefabrication type drainage canal structure according to the present invention;

FIG. 9 is a view illustrating a state that a protection net is engaged in a prefabrication type drainage canal structure according to the present invention;

FIG. 10 is a front view illustrating a state that a protection net is engaged in a prefabrication type drainage canal structure according to the present invention;

FIG. 11 is a perspective view illustrating a drainage canal structure according to the present invention;

FIG. 12 is a cross sectional view illustrating a drainage canal structure of FIG. 11;

FIG. 13 is an enlarged view illustrating a through hole of a portion “A” of a drainage canal structure of FIG. 11;

FIG. 14 is a perspective view illustrating a state that an upper reinforcing plate is installed at a guide unit of a drainage canal structure according to the present invention;

FIG. 15 is a cross sectional view illustrating a portion “B” of a drainage canal structure of FIG. 14;

FIG. 16 is a perspective view illustrating a state that a protection net is installed over the tops of the drainage canal bodies of a drainage canal structure according to the present invention;

FIG. 17 is a cross sectional view illustrating a state that a reinforcing unit is installed in a drainage canal body in a drainage canal structure according to the present invention;

FIG. 18 is a view illustrating a state that a drainage canal structure is installed at a drainage canal of a drainage canal structure according to the present invention;

FIG. 19 is a perspective view illustrating a plurality of drainage canal structures are connected in a drainage canal structure according to the present invention;

FIG. 20 is a cross sectional view illustrating a portion “C” of a drainage canal structure of FIG. 19;

FIG. 21 is an enlarged view illustrating portions “F” and “G” of a drainage canal structure of FIG. 20;

FIG. 22 is a cross sectional view illustrating a portion “D” of a drainage canal structure of FIG. 19;

FIG. 23 is a cross sectional view illustrating a portion “E” of a drainage canal structure of FIG. 19;

FIG. 24 is a perspective view illustrating a drainage canal structure which is last connected when connecting a plurality of drainage canal structures according to the present invention;

FIG. 25 is a cross sectional view illustrating a portion “H” of a drainage canal structure of FIG. 24;

FIG. 26 is a perspective view illustrating a pressure-resistant reinforcing plate of a drainage canal structure of FIG. 24;

FIG. 27 is a perspective view illustrating a drainage canal structure in which a waveform reinforcing unit is formed at a drainage canal body of a drainage canal structure according to the present invention;

FIG. 28 is a cross sectional view illustrating a drainage canal structure of FIG. 27;

FIG. 29 is a perspective view illustrating a guide unit of a drainage canal structure according to the present invention;

FIG. 30 is a side view illustrating a drainage canal structure of FIG. 27;

FIG. 31 is an enlarged view illustrating a portion “A” of a drainage canal structure of FIG. 30;

FIG. 32 is an enlarged view illustrating a portion “B” of a drainage canal structure of FIG. 30;

FIG. 33 is a view illustrating a shape of a waveform reinforcing unit of a drainage canal structure according to the present invention;

FIG. 34 is a perspective view illustrating a drainage canal structure in which an engaging bar and a reinforcing piece are installed according to the present invention;

FIG. 35 is a front view illustrating a drainage canal structure in which an engaging bar and a reinforcing piece of FIG. 34 are installed;

FIG. 36 is a view illustrating a state that an engaging bar and a reinforcing piece are installed in a drainage canal structure of FIG. 34;

FIG. 37 is a perspective view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure according to the present invention;

FIG. 38 is a projected view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure of FIG. 37;

FIG. 39 is a front view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure of FIG. 37;

FIG. 40 is a perspective view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure according to the present invention;

FIG. 41 is a side view illustrating a drainage canal structure of FIG. 40;

FIG. 42 is a side view illustrating a state that a plurality of through holes are formed at the tops of side surfaces of a drainage canal body of a drainage canal structure of FIG. 40;

FIG. 43 is a front view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure of FIG. 40;

FIG. 44 is a view illustrating a structure of an outer reinforcing member of a drainage canal structure of FIG. 40;

FIG. 45 is a perspective view illustrating a state that an inner reinforcing member is installed at a drainage canal body of a drainage canal structure according to the present invention;

FIG. 46 is a front view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure of FIG. 45; and

FIG. 47 is a perspective view illustrating a state that a connection bar is installed at an inner side of an outer reinforcing member of a drainage canal body of a drainage canal structure according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

The preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The drainage canal structure according to the present invention has features in that a drainage canal structure can be manufactured on the spot and can be installed in an easier way as compared with the conventional art in which the drainage canal structure is manufactured at a factory and is transported from the factory to the spot of the construction.

In addition, the present invention makes it possible to guide the flow of water by installing a drainage canal structure at a drainage canal so as to prevent rain water or drainage water from flowing into the ground or onto the ground wherein the drainage canal where the drainage canal structure of the present invention is installed is provided at the ground near a cutting area, a river or an agricultural field so as to guide the flow of rain water or drainage water.

As shown in FIGS. 1 to 6, the present invention is directed to a prefabrication type drainage canal structure 100′ which is installed at a drainage canal 10′ formed on the ground of a cutting area and comprises a drainage canal body 200 a′ which is installed in the drainage canal 10′ and is formed of a plurality of winkled units 210′ protruding from its outer surface at regular interval, and a cover unit 300′ which covers the tops of the drainage canal body 200 a′ and at both sides of which is respectively provided an upside down channel shaped angle unit 310 a′ for thereby engaging both ends of the top of the drainage canal body 200 a′ and which comprises a plurality of connection plates 320′ disposed at regular intervals in a longitudinal direction of the side portion of an angle unit 310 a′ for thereby connecting the angle units 310 a′ of both sides.

As shown in FIGS. 6 and 7, the upside down channel shaped angle unit 310 a′ is installed at both ends of the top of the drainage canal body 200 a′. The angle unit 310 a′ comprises a horizontal part 311′ formed at the top and a vertical part 312′ of one side or the other side vertically connected to both ends of the horizontal part 311′. An engaging unit 313′ passes through the vertical part 312 of the one side. At the vertical part 312′ of the other side is formed an insertion unit 314′ which faces the engaging unit 313′ of the vertical part of the one side and has a diameter two times the diameter of the engaging unit 313′. At both ends of the top of the drainage canal body 200 a′ is provided an engaging unit 211′ which communicates with the engaging unit 313′ and the insertion unit 314′.

The screw bolt 50 a′ is inserted through the insertion unit 314′ of the angle unit 310 a′ and passes through the engaging unit 211′ of the drainage canal body 200 a′ and comes into close contact with the engaging unit 313′ of the angle unit 310 a′, so the angle unit 310 a′ of the cover unit 300′ is engaged to both ends of the top of the drainage canal body 200 a′.

As shown in FIG. 8, an anchor pin 410′ is planted into the ground of the bottom of the drainage canal 10′ in a diagonal direction outside the drainage canal body 200 a′. There is further provided a wire anchor 400′ formed of a wire 420′engaged to the screw bolt 50 a′ which protrudes from one side of the angle unit 310 a′ of the cover unit 300′, for thereby preventing the drainage canal body 200 a′ mounted in the drainage canal 10′ from disengaging.

The anchor pin 410′ is formed of a flat plate whose vertical cross section is a V-shape. A through hole 412′ is formed at a wing unit 411′. The wire anchor 400′ is formed in an upward direction as the wire 420′ is connected through the through hole 412′.

As shown in FIGS. 9 and 10, there is further provided a protection net 500′ which is covered over the top of the cover unit 300′, which makes it possible to prevent the impurities contained in rain water and wild animals from entering the drainage canal body 200 a′.

The end portion of the protection net 500′ is engaged, using a welding method or a bolt 50 b′ whose head is a circular dish shape, to the top of the cover unit 300′, more specifically, the horizontal part 311′ of the angle unit 310 a′ of the cover unit 300′, so people are interrupted when they pass by.

According to another embodiment of the present invention, as shown in FIGS. 11 to 23, there is provided a prefabrication type drainage canal structure 100 which has a drainage canal body 200 installed at a drainage canal disposed on the ground of a cutting area and having a channel shaped vertical cross section, which comprises horizontal wing pieces 250 which extend in longitudinal directions from the tops of both sides of the drainage canal body 200; and a plurality of reinforcing units 220 which are arranged at regular intervals traversing both sides of the drainage canal body 200.

As shown in FIG. 11, the channel shaped drainage canal body 200 may be manufactured in such a way that a flat steel plate is bent in a channel shape or a flat steel plate is connected in series by a welding in a channel shape.

As shown in FIG. 16, a horizontal wing piece 250 may be prolonged in a longitudinal direction from the tops of both sides of the drainage canal body 200, and the plate shaped wing piece 250 is connected in a longitudinal direction to the tops of both sides of the drainage canal body 200. The guide unit 270 is mounted on the top of the wing piece 250 for thereby reinforcing the wing piece 250, and the top of the drainage canal 200 is covered by a net shaped protection net 300. Both ends of the protection net 300 surface-contact with the guide surface 271 of the guide unit 270 mounted on the top of the wing piece 250 and are engaged thereto using one of a screw, a piece, a rivet or a bolt and a nut, so only rain water can pass thanks to the net shaped protection net 300, but gravels or impurities cannot pass through the protection net 300.

As shown in FIG. 17, a plurality of reinforcing units 220 partitioning at regular intervals the inner space of the drainage canal body 200 are provided in rows while traversing the same for thereby preventing any transformation of the drainage canal body 200 when soil pressure is applied thereto as it is installed at a drainage canal. The above mentioned reinforcing units 220 are provided in multiple rows and in multiple tier structures at regular intervals in the interior of the drainage canal structure 100 because it is impossible for the reinforcing units 220, which used to be conventionally installed in one row, to endure the soil pressure or the internal pressure of the drainage canal body 200 (more specifically, the pressure which is inwardly applied due to the weight of the flat plate of both sides of the drainage canal) as the size of the drainage canal body 200 changes based on the width of the drainage canal, and the width and depth of the inner side of the drainage canal increase.

The size of the drainage canal body 200 changes based on the volume of the drainage canal. At this time, the reinforcing units 220 each spaced apart at regular intervals while traversing from both sides of the inner space of the drainage canal body 200 are installed in multiple rows based on the size of the drainage canal body 200, thus keeping stably the drainage canal body 200.

The reinforcing units 220 of the present invention are provided so as to keep stability based on the size of the drainage canal body 200; however they are not limited to the construction shown in the drawings.

The reinforcing unit 220 can be manufactured in a circular rod shape, a plate shape, etc. and is not limited to its shape. It is provided for the purpose of reinforcing the inner structure of the drainage canal body 200.

As shown in FIGS. 19 to 21, when the reinforcing units 220 are installed in the upper, inner side of the drainage canal body 200, the engaging surface of the guide unit 270 surface-contacts with the inner side surface of the drainage canal body 200 and then is engaged to the same using a bolt and a nut or a rivet. At this time, the bolt and nut or rivet are integrally engaged to the engaging surface 272 of the guide unit 270 and one end of each of the reinforcing units 220. When a drainage canal structure 100 is connected to another drainage canal structure 100, one end of the drainage canal structure 100 of one side is mounted and folded on the inner surface of one end of the drainage canal structure 100 of the other side. The surface-contacting portions are engaged using a bolt and a nut or a rivet. At this time, the engaging surface 272 of the guide unit 270 is integrally engaged to one end of each of the reinforcing units 220, so the side surfaces of the folding drainage canal structures 100 are integrally engaged.

As shown in FIGS. 11 and 13, at the tops of both sides of the drainage canal body 200 is provided a drainage canal structure 100 in which there are provided a plurality of through holes 230 which are spaced apart in longitudinal directions at regular intervals.

Since there are installed a plurality of through holes 230 which are formed on the tops of both sides of the drainage canal body 200 in longitudinal directions at regular intervals, the rain water which is inputted along with soil and sand from both sides of the drainage canal can be inputted through the through holes 230 for thereby preventing the collapse of the soil and sand of both sides wherein the drainage canal body 200 is installed at a drainage canal.

The through holes 230 protrude outwards from the side surfaces of the drainage canal body 200 and are formed in a protruded triangle shape when viewing from the front of the drainage canal structure 100. The rain water flowing in from the side surfaces of the drainage canal moves into the interior of the drainage canal body 200 through the through holes 230 and flows along.

In addition, instead of using the above mentioned shape of the through hole 230, an oblique shape or projecting shape through hole 230 may be provided so as to prevent the clogging when rain flows in through the through holes 230 which are cut away in an oblique shape from the side surfaces of the drainage canal body 200.

As shown in FIGS. 11, 12 and 29, there may be provided a horizontal flat shape guide surface 271 formed in a longitudinal direction at each of the tops of both sides of the drainage canal body 200, and a guide unit 270 which is formed of an engaging surface 272 bent from an end portion of the guide surface 271 in a vertical direction and extending from the same. The guide unit 270 is installed at the top of each of both sides of the drainage canal body 200. In the above mentioned structure, one surface of the engaging surfaces 272 of the guide unit 270 comes into surface contact with one surface of the top of the drainage canal body 200 and is engaged by a screw, a piece, a bolt and a nut or a rivet, so the guide unit 270 is engaged to each of the tops of both sides of the drainage canal body 200.

As shown in FIG. 16, both ends of the protection net 300 surface-contacts with the guide surface 271 of the guide unit 270 for thereby covering the tops of the drainage canal body 200, and both ends of the protection net 300 which surface-contacts with the guide surface 271 of the guide unit 270 are engaged using a screw, a piece, a bolt and a nut or a rivet for thereby finishing an installation at the drainage canal.

One end of the guide surface 271 of the guide unit 270 is engaged as the engaging surface 272 bent and extending long in a vertical direction surface-contacts with a side surface of the inner side of the drainage canal body 200, and the other end of the guide surface 271 of the guide unit 270 is short in a vertical direction, more specifically, is shorter than the length of the engaging surface 272 and surface-contacts with the end portion of the wing piece 250 of the drainage canal body 200, so the guide unit 270 surface-contacts with the wing piece 250 of the drainage canal body 200 and does not escape.

As shown in FIGS. 14, 15 and 16, there are provided a plurality of upper reinforcing plates 280 which are spaced apart at regular intervals and traverse the engaging surface 272 of the guide unit which surface-contacts with the tops of the wing pieces 250 of both sides of the drainage canal body 200 before the net shaped protection net 300 is installed. Here, the net shaped protection net 300 is installed at regular intervals over the tops of the upper reinforcing plates 280 disposed at regular intervals and traversing the engaging surface 272 of the guide unit 270 engaged to the tops of the wing pieces 250 formed at both sides of the drainage canal body 200, and the drainage canal structure 100 is provided over the top of the net shaped protection net 300 and is strong enough for people to step on.

As shown in FIGS. 27 to 33, there are provided a plurality of wave-shaped reinforcing units 210 which are formed at regular intervals on an outer surface, an inner surface or both outer and inner surfaces of the drainage canal body 200. The wave-shaped reinforcing units 210 which protrude at regular intervals on an outer surface, an inner surface or both inner and outer surfaces of the drainage canal body 200 is strong like the drainage canal body formed in a flat plate structure. Thanks to the wave-shaped reinforcing units 200, it is possible to prevent any transformation due to external impacts in the middle of manufacture or construction. In addition, it is possible to prevent any transformation of the drainage canal structure 100 due to the soil pressure in the interior of the drainage canal when it is installed at a drainage canal for thereby enhancing a physical property of the structure.

The shape of the wave-shaped reinforcing unit 210 may be a semicircular shape, an inverted triangle shape or a quadrangle shape. Such shapes do not limit the scope of the present invention. It may be formed in various shapes.

As shown in FIGS. 30, 31 and 32, when interconnecting the drainage canal structures 100, a plate shaped first assembling unit 240 a extending with a certain is formed at one side of the inner surface of the drainage canal body 200. There is provided a plate shaped second assembling unit 240 b extending with a certain width wider in such a way that the width of the other side of the inner surface is wider as compared with the width of the first assembling unit 240 a formed at one side of the drainage canal body 200.

When the drainage canal structures 100 are interconnected and assembled, they are assembled in such a way to be folded at both ends of the assembled drainage canal body 200. When assembling in such a way to be folded, the first assembling unit 240 a of the end portion of the drainage canal body 200 of one side is folded on the second assembling unit 240 b of the end portion of the drainage canal body 200 of the other side and is engaged thereto by a screw, a piece, a bolt and a nut or a rivet for thereby withstanding the soil pressure which is transferred to the leakage prevention and engaging portions for thereby preventing any transformation and leakage of the drainage canal structure 100.

As shown in FIGS. 11 and 12, a plurality of steel angle-shaped lateral side reinforcing plates 260 are provided at regular intervals in longitudinal directions at both sides of the drainage canal body 200. The lateral side reinforcing plates 260 are engaged at both sides of the drainage canal body 200 using a bolt and a nut, a screw, a piece or a rivet. Since the side lateral reinforcing plates 260 are provided, the drainage canal body can be disposed in place on the bottom of the drainage canal for thereby preventing the disengagement of the same and any transformation of both side surface of the drainage canal body 200 due to the soil pressure of the inner side of the drainage canal.

As shown in FIGS. 19, 23 to 26, a plurality of the drainage canal structures 100 are interconnected in a longitudinal direction of the drainage canal. A channel shaped and plate shaped pressure-resistant plate 290 is installed at an inner surface of one end of the drainage canal body 200 having the other side to which is not connected the drainage canal body 200 which is opposite to one side to which is connected the drainage canal structure 100, which is connected first or last, more specifically, is connected the drainage canal bodies 200. The pressure resistant reinforcing plate 290 is installed at an inner surface of one end of the drainage canal body 200 so as to prevent one side end of the drainage canal from being transformed by the soil pressure at both sides of the drainage canal structure 100, as a result of which any transformation of the drainage canal body 200 can be prevented.

As an engaging means, a bolt and a nut, a screw, a piece or a rivet is not limited thereto. Any engaging means which provides a stable engagement or disengagement can be used.

As shown in FIGS. 34 to 36, instead of the reinforcing unit 200, there may be provided a drainage canal structure 100 which comprises an engaging bar 300 which has a laid channel-shaped cross section and is vertically installed facing both inner sides of the drainage canal body 200 and is formed of a fixing surface 301 surface-contacting with one side of the interior of the drainage canal body 200 and having a plurality of through holes 303 arranged at regular intervals, and an engaging surface 302 having a second through hole 304 which can communicate as it is bent in the directions of both sides of the fixing surface 301; and a pair of plate-shaped reinforcing pieces 310 which are arranged in a X-shape traversing in an oblique direction in relation with the engaging bar 300 formed at both sides of the interior of the drainage canal body 200 and which each have a third trough hole 311 at both ends and are engaged with a bolt 40 and a nut 55 or a rivet while communicating with the second through hole 304 of the engaging bar 300.

The engaging bars 300 are installed facing each other at both sides of the interior of the drainage canal body 200. When the engaging bar 300 is installed in the interior of the drainage canal body 200, the fixing surface 301 of the engaging bar 300 is vertically fixed at one side of the interior of the drainage canal body 200 using a bolt 50 and a nut 55 or a rivet inserted through the first through hole 303 formed at the fixing surface 301 of the engaging bar 300. The engaging bar 300 has the same length as the height of one side surface of the interior of the drainage canal body 200.

The engaging surface 302 is bent and extends from both sides of the fixing surface 301 of the engaging bar 300, and the engaging bar 300 has a laid channel shaped cross section. The second through holes 304 arranged at regular intervals are formed at both sides of the engaging surface 302.

The engaging piece 305 extends upward from the top of the engaging surface 302 of the engaging bar 300. Since the fixing surface 301 connecting the engaging pieces 305 of both sides is absent at the engaging piece 305, the engaging piece 305 directly surface-contacts with the engaging surface 272 of the guide bar 270 covering both ends of the top of the drainage canal body 200, so the engaging bar 300 can be stably engaged to the interior of the drainage canal body 200 while providing aesthetic exterior.

As shown in FIG. 36, a pair of reinforcing pieces 310 are installed in a X-shape traversing in an oblique direction in relation with the engaging bar 300 which is installed facing each other in the interior of the drainage canal body 200. One end of the reinforcing piece 310 with a third through hole 311 formed at its both ends passes through the second through hole 304 of the engaging surface 302 for the reinforcing pieces 310 to be fixed at the engaging surface 302 of the engaging bar 300 and is fixed using a bolt 50 and a nut 55 or a rivet.

Since the reinforcing pieces 310 are installed traversing the engaging bars 300 which are installed at both sides of the interior of the drainage canal body 200 in an X-shape. The drainage canal body 200 is installed at a drainage canal of a cutting area so that any distortion used to happen due to the soil pressure buried at both outer sides of the drainage canal body 200 does not occur in the drainage canal body 200 for thereby providing a stable support force against the soil pressure.

As shown in FIG. 36, there is provided a drainage canal structure which is engaged with a bolt 50 and a nut 55 or a rivet wherein a fourth through hole 312 is formed at one surface where the reinforcing pieces 310 cross in a X-shape and surface-contact.

As shown in FIGS. 37 to 39, a plurality of steel angle-shaped side reinforcing plates 260 are installed at regular intervals in longitudinal directions at both sides of the drainage canal body 200. When the side reinforcing plates 260 are assembled to a side portion of the drainage canal body 200, the fixing surface 301 of the engaging bar 300 surface-contacts with the inner side of the drainage canal body 200 and is fixed at the inner side of the drainage canal body 200 through the first through hole 303 of the fixing surface. At this time, the bolt 50 passes through the first through hole 303 formed at the bottom of the fixing surface 301 and though one surface of one inner side of the drainage canal body 200 and through one surface of the side reinforcing plate 260 and is engaged with a nut 55, so one surface of the inner side of the drainage canal body 200 and one surface of the side reinforcing plate 260 are integrally engaged with a bolt 50 and a nut 55 or a rivet.

The side reinforcing plate 260 of the drainage canal body 200 where the engaging bar 300 is installed, is installed at an inner side of the drainage canal body 200. There is provided a drainage canal structure 100 in which a side reinforcing plate 260 is further installed at one surface of the outer side of the drainage canal body 200 so as to obtain more stable engaging force by which to prevent the disengagement of the drainage canal structure 100 in the drainage canal.

As shown in FIGS. 4 to 42, there is provided an outer reinforcing member 32 which has features in that a side support bar 321 is vertically fixed in a longitudinal direction at both outer sides of the drainage canal body 200. A bottom support bar 322 surface-contacts with the lower end of the side support bar 321 and is horizontally fixed at the bottom of the outer side of the drainage canal body 200 and extends in the direction of both sides of the drainage canal body 200, and a slope bar 323 is installed at a certain slope at one surface of the bottom support bar 322 on one surface of the side support bar 321.

The side support bar 321 of the outer reinforcing member 320 is vertically installed at an outer surface of the drainage canal body 200 and is fixed at a side surface of the drainage canal body 200 with a bolt and a nut, a rivet or a piece. The lower end of the side support bar 321 is fixedly engaged to one surface of the bottom support bar 322 and is attached to the bottom of the outer lower side of the drainage canal body 200 and is fixed with a bolt and a nut, a rivet or a piece.

The side support bar 321 and the bottom support bar 322 of the outer reinforcing member 320 are fixed at both side surfaces and the bottom of the drainage canal body 200, respectively, for thereby more stably keeping the structure of the drainage canal body 200 (preventions of distortion and bending of the drainage canal body). A slope bar 23 is installed at a certain slope at one surface of the bottom support bar 322 in one surface of the side support bar 321 so as to provide a resistance force against the soil pressure at the outer sides of the drainage canal body 200 before and after the construction for thereby resolving the problems related with the soil pressure.

A plurality of outer reinforcing members 320 are installed at an outer surface of the drainage canal body 200 for thereby more stably supporting the drainage canal body 200.

The side support bar 321 of the outer reinforcing member 320 is vertically installed in consideration of the configuration of the drainage canal body 200; however it is obvious that the side support bar 321 of the outer reinforcing member 320 is sloped at a certain angle when both sides of the drainage canal body 200 are sloped at certain angles.

In addition, a plurality of the outer reinforcing members 320 are installed at an outer surface of the drainage canal. When it is installed at a drainage canal of a slope area, it is possible to increase the friction force with the ground thanks to the outer reinforcing member 320, so the drainage canal body 200 is not slipped or disengaged from the ground for thereby accurately installing the drainage canal body 200 at the drainage canal in the middle of the construction. In addition, it is possible to keep the drainage canal body 200 in place in the drainage canal after the construction.

According to another embodiment of the present invention, as shown in FIG. 42, there is provided a drainage canal structure comprising a plurality of through holes arranged at regular intervals in longitudinal directions at the tops of both sides of the drainage canal body 200 of FIG. 40. Since a plurality of the through holes 230 are arranged at regular intervals in longitudinal directions at the tops of both sides of the drainage canal body 200, the drainage canal body 200 can be stably installed at the drainage canal, so the rain water flowing in along with the soil and sand from both sides of the drainage canal is guided to flow through the through holes 230 for thereby preventing the collapses of the soil and sand of both sides of the drainage canal.

As shown in FIGS. 45 and 46, a plurality of inner reinforcing members 330 are installed at regular intervals at the inner surface of the drainage canal body 200 wherein the inner reinforcing member 330 is formed as the connection bars 331 are connected in quadrangle shapes for the same to surface-contact with the inner surface of the drainage canal body 200 and to be fixed.

The inner reinforcing member 330 has features in that the connection bars 331 looking like a straight line are connected in a quadrangle shape, and the inner reinforcing member 330 formed in the quadrangle shape surface-contacts with a circumferential surface of the drainage canal body 200 and is fixed with a bolt and a nut, a rivet or a piece.

The connection bars 331 forming both sides and the bottom of the inner reinforcing member 330 are fixedly installed surface-contacting with both inner surfaces and inner bottom of the drainage canal body 200.

As shown in FIG. 47, there is further provided a connection bar 331 connecting the connection bars 331 of both sides to the inner side of the connection bar 331 at both sides in the inner reinforcing member 330 for thereby supporting the external impacts against the intermediate portions of both sides of the drainage canal body 200.

In the drainage canal body 200 which comprises a pair of reinforcing pieces 310 arranged in a X-shape traversing in an oblique direction in relation with the engaging bars 300 which face each other or in the drainage canal body 200 equipped with the outer reinforcing member 320 or in the drainage canal body 200 equipped with the inner reinforcing member 330, a plurality of through holes 230 may be installed at regular intervals in longitudinal direction at the tops of both sides of the drainage canal body 200, and a guide unit 270 is installed in a longitudinal direction at the tops of both sides of the drainage canal body 200 and comprises a horizontal flat plate shaped guide surface 271 and an engaging surface 272 vertically bent and extending from both ends of the guide surface 271, and a mesh shaped protection net 300 may be installed so as to cover the top of the drainage canal body 200, and a plurality of steel angle shaped side reinforcing plates 260 may be installed in longitudinal directions at both sides of the drainage canal body 200, and a plurality of upper reinforcing plates 280 may be connected at regular intervals traversing the engaging surface 272 of the guide unit 270 formed at both sides of the drainage canal body 200.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims. 

What is claimed is:
 1. A prefabrication type drainage canal structure (100′) which is installed at a drainage canal (10′) provided on the ground of a cutting area, comprising: a drainage canal body (200 a′) which is installed in the interior of the drainage canal (10′) and is formed of a plurality of wrinkled units (210′) protruding from its outer surface and arranged at regular intervals; a cover unit (300) which covers the top of the drainage canal body (200 a′), an upside down channel shaped angle unit (310 a′) being formed at both sides for engaging both ends of the top of the drainage canal body (200 a′), the cover unit (300) being formed of a plurality of connection plates (320′) which are arranged at regular intervals in the longitudinal direction of the sides of the angle unit for connecting the angle units of both sides; and a wire anchor which is formed of an anchor pin (410′) fixed underground of the bottom of the drainage canal (10′) in an oblique direction at the outer side of the drainage canal body (200 a′), and a wire (420′) which is connected to the anchor pin (410′) and then is connected to a screw bolt (50 a′) protruding from one side of the angle unit (310 a′) of the cover unit (300′).
 2. The structure of claim 1, further comprising a protection net (300) at the top of the cover unit (300′).
 3. The structure of claim 1, wherein the angle unit (310 a′) comprises: a horizontal part (311′) formed at the top; and a vertical part (312′) of one side or the other side which is vertically connected to both ends of the horizontal part (311′), wherein there are provided an engaging unit (313′) passing through the vertical part (312′) of one side, and an insertion unit (314′) which is disposed at the vertical part (312′) of the other side and which faces the engaging unit (313′) of the vertical part of one side and has two times larger diameter than the diameter of the engaging unit (313′).
 4. A prefabrication type drainage canal structure (100) which has a drainage canal body (200) installed at a drainage canal disposed on the ground of a cutting area and having a channel shaped vertical cross section, comprising horizontal wing pieces (250) which extend in longitudinal directions from the tops of both sides of the drainage canal body (200); and a plurality of reinforcing units (220) which are arranged at regular intervals traversing both sides of the drainage canal body (200).
 5. The structure of claim 4, wherein a plurality of protrusion type waveform reinforcing units (210) on at least one surface between an outer surface an inner surface of the drainage canal body (200).
 6. The structure of claim 4, wherein a channel shaped plate type pressure resistant reinforcing plate (290) is installed at an inner surface of one end of the drainage canal body (200).
 7. The structure of claim 5, wherein a plate-shaped first assembling unit (240 a) extends with a certain width from one side of the inner surface of the drainage canal body (200), and a plate-shaped second assembling unit (240 b) extends with a certain width in such a way that the width of the other side of the inner surface is wider as compared with the width of the first assembling unit (240 a) formed at one side of the drainage canal body (200).
 8. The structure of claim 4, wherein there are provided a laid channel shaped engaging bar (300) comprising a fixing surface (301) which is vertically installed facing both sides of the interior of the drainage carnal body (200) instead of installing the reinforcing unit (220) and which is formed of a plurality of first through holes (303) formed at regular intervals from one another for the same to surface-contact with one surface of the inner side of the drainage carnal body (200), and an engaging surface (302) which is formed of a plurality of second through holes (304) bent toward both sides of the fixing surface (301) and being communicating; and a pair of plate-shaped reinforcing pieces (310) which are installed in a X-shape traversing in an oblique direction in relation with the engaging bars (300) formed at both sides of the interior of the drainage carnal body (200) and each are formed of a third through hole (311) which communicates with the second through hole (304) of the engaging bar (300) and is formed at both ends and is engaged with a bolt (50) and a nut (55) or a rivet.
 9. The structure of claim 8, wherein an engaging piece (305) extends upward from the top of the engaging surface (302) of the engaging bar (300).
 10. The structure of claim 8, wherein a fourth through hole (312) is formed at one surface where the reinforcing pieces (310) cross each other in a X-shape and surface-contact with each other and is fixedly engaged with a bolt (50) and a nut (55) or a rivet.
 11. The structure of claim 4, wherein there are provided integrated outer reinforcing members (320) which each comprise a side support bar (321) which is fixed in a vertical longitudinal direction at both outer sides of the drainage carnal boy (200) instead of installing the reinforcing unit (220), and a bottom support bar (322) which surface-contacts with the end of the lower side of the side support bar (321) and is fixed horizontally on the bottom of the outer side of the drainage canal body (200) and extends in the direction of both sides of the drainage canal body (200), and an outer reinforcing member (320) which is formed of a slope bar (323) installed at a certain slope at one surface of the bottom support bar (322) in one side of the side support bar (321).
 12. The structure of claim 1, wherein instead of installing the reinforcing unit (220), there are provided a plurality of inner reinforcing members (330) which are installed at regular intervals at an inner surface of the drainage canal body (200) and are formed as a connection bar (331) which surface-contacts with the inner surface of the drainage canal body (200) and is fixed is connected in a quadrangle shape.
 13. The structure of claim 4, wherein there are provided a plurality of through holes (230) which are spaced apart at regular intervals in longitudinal directions from the tops of both sides of the drainage canal body (200).
 14. The structure of claim 4, wherein there is provided a guide unit (270) which is installed in a longitudinal direction at the tops of both sides of the drainage canal body (200) and is formed of a horizontal, flat guide surface (271) formed at top and an engaging surface (272) which is vertically bent from both sides of the guide surface (271) and extends.
 15. The structure of claim 4, wherein a protection net (300) is provided over the tops of the drainage canal body (200).
 16. The structure of claim 4, wherein a plurality of steel angle shaped side reinforcing plates (260) are installed at regular intervals in longitudinal directions at both sides of the drainage canal body (200).
 17. The structure of clime 14, wherein there are provided a plurality of upper reinforcing plates (280) which are interconnected at regular intervals traversing the engaging surface of the guide unit (270) formed at both sides of the drainage canal body (200). 